Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/DebugInfo/X86/debug-dead-local-var.ll

@@ -0,0 +1,53 @@
+; RUN: llc -mtriple=x86_64-linux-gnu %s -filetype=obj -o %t
+; RUN: llvm-dwarfdump %t | FileCheck %s
+
+; Reconstruct this via clang and -O2.
+; static void foo() {
+;   struct X { int a; int b; } xyz;
+; }
+
+; int bar() {
+;   foo();
+;   return 1;
+; }
+
+; Check that we don't have the structure type for X since its scope has
+; been optimized away.
+; CHECK-NOT: DW_TAG_structure_type
+; CHECK: DW_TAG_subprogram
+; CHECK: DW_AT_name {{.*}}"bar"
+; CHECK-NOT: DW_TAG_structure_type
+
+; Function Attrs: nounwind readnone uwtable
+define i32 @bar() #0 !dbg !4 {
+entry:
+  ret i32 1, !dbg !21
+}
+
+attributes #0 = { nounwind readnone uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!18, !19}
+!llvm.ident = !{!20}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 (trunk 209255) (llvm/trunk 209253)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
+!1 = !DIFile(filename: "debug-dead-local-var.c", directory: "/usr/local/google/home/echristo")
+!2 = !{}
+!4 = distinct !DISubprogram(name: "bar", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !0, scopeLine: 11, file: !1, scope: !5, type: !6, variables: !2)
+!5 = !DIFile(filename: "debug-dead-local-var.c", directory: "/usr/local/google/home/echristo")
+!6 = !DISubroutineType(types: !7)
+!7 = !{!8}
+!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!9 = distinct !DISubprogram(name: "foo", line: 6, isLocal: true, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !0, scopeLine: 6, file: !1, scope: !5, type: !10, variables: !12)
+!10 = !DISubroutineType(types: !11)
+!11 = !{null}
+!12 = !{!13}
+!13 = !DILocalVariable(name: "xyz", line: 8, scope: !9, file: !5, type: !14)
+!14 = !DICompositeType(tag: DW_TAG_structure_type, name: "X", line: 8, size: 64, align: 32, file: !1, scope: !9, elements: !15)
+!15 = !{!16, !17}
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 8, size: 32, align: 32, file: !1, scope: !14, baseType: !8)
+!17 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 8, size: 32, align: 32, offset: 32, file: !1, scope: !14, baseType: !8)
+!18 = !{i32 2, !"Dwarf Version", i32 4}
+!19 = !{i32 2, !"Debug Info Version", i32 3}
+!20 = !{!"clang version 3.5.0 (trunk 209255) (llvm/trunk 209253)"}
+!21 = !DILocation(line: 13, scope: !4)